Sawmill.



D. L. ADAMS.

SAWMILL.

APPLICATION FILED SEPT. 19,1913.

1,105,553 1 Patented July 28, 1914.

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illlmllllllllllm TE al DAVID L. ADAMS, OF AYLETT, VIRGINIA.

To all whom it may concern Be it known that I, DAVID L. ADAMS, a citizen of the United States, residing at Aylett,in the county of King Will'iam and State of Virginia, have invented new and useful Improvements in Sawmills, of which the following is a specification.

This invention relates to saw mills and particularly to the saw mill dog mechanism, the object of the invention being to provide a novel mounting for the master dog, whereby, when a logyis removed from the carriage and the dog is left unsupported, it will be automatically turned out of the way of the saw so as not to injure the saw by coming in contact therewith during the further movement of the carriage. Ordinarily it is necessary to shift the dog referred to by hand after the removal of the work from the carriage and as a result the position of the dog is often inadvertently overlooked, resulting in serious damage to the saw and 'other parts of the machine as well as endangering the life of those standing near the carriage and saw.

The broad object of the invention is to render this condition impossible by provid ing means for moving the dog out of the path of the saw.

W'ith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as will hereinafter be more fully described, illustrated and claimed.

In the accompanying drawings:-Figure l is a plan view of a sufficient portion of a saw mill carriage to illust 'ate the application of the present invention thereto. Fig. 9. is a side elevation of the same. Fig. 3 is a vertical section on the line 3-8 of Fig. 1. Fig. 4 is a vertical section on the line 4--4 of Fig. 1.

Referring to the drawings, 1 designates a saw mill carriage of ordinary construction the same being mounted upon the carrying wheels 2 bear-mg the usual relation to the frame of the saw carriage.

3 designates the master dog which in carrying out the present invention is mounted to slide up and down on a vertical shaft 4, the dog 3 being rovided with a hub or body 5 having a central. opening for the shaft 4 and provided on the under side thereof with ratchet teeth 6 the purpose of which will hereinafter appear. The shaft 4 is journaled in suitable bearings on the carriage Specification of Letters Patent.

Application filed. September 19, 1913.

SAWMILL.

Patented July 28, 1914.

Serial No. 790,727.

and i provided below the floor or log supporting surface of the carriage with a bevel gear wheel 7 which meshes with and is driven by a bevel gear wheel 8 fast on a horizontal shaft 9 which extends laterally to one side of the carriage where it has fast thereon a spur gear wheel 10 meshing with and driven by a similar gear wheel 11 on one of the carrying wheels 2 or the axle 12 of one pair of wheels. By means of the gearing just referred to, the shaft 4 is continuously revolved while the carriage is in operation. The wheel 7 is provided on its upper side with a hub or sleeve 13 provided with ratchet teeth 1.4 which are adapted to engage the ratchet teeth (3 on the bottom of the dog when the dog slides downwardly on the shaft 4. In this way a partial rotation is imparted to the dog 3. As the dog is revolved on the shaft 4 by means of the ratchet teeth 6 and 14, the oppositely projecting portions of the dog ride upwardly upon the wedge-shaped projections or cams 15 which are of suflicient rise or height to elevate the dog 3 to a position where the teeth (3 will be moved out of engagement with the teeth 14. WVhen this occurs, the dog comes to rest upon the projections 15 at a time when said dog extends substantially in the direction of length of the carriage. At such time the dog occupies a position out of the path of the saw so that it is impossible for said dog to come into contact with the teeth of the saw. As the wheel 7 is continually revolving, the action referred to of the dog takes place whenever the dog descends by gravity after being released from the work.

lVhat I claim is 1. The combination with a saw mill car riage, of a dog, a rotary shaft geared to and driven by one of the wheels of said carriage and having said dog mounted to turn loosely thereon, and ratchet elements on said shaft and dog brought into cooperative relation when the dog is unsupported by a log, whereby the dog i moved out of the path of the saw.

2. The combination with a saw mill carriage, of a dog, a rotary shaft geared to and driven by one of the wheels of said carriage and having said dog mounted to turn loosely thereon, ratchet elements on said shaft and dog brought into cooperative relation when the dog is unsupported by a log, whereby the dog is moved out of the path of the saw, and means operating automatically to disengage said ratchet elements after such I and means in the form of a cam for elevatmovement of the dog.

in said do and .disen 'a 'in said ratchet D b b b 3. The combination with a saw mill carelement-s after the dog has been so moved.

riage, of a dog a rotary shaft geared toand; D

5 driven by one of the Wheels of said carriage and havingsaid dog mounted to turn loosely thereon, ratchet elements on said shaft and dog brought into cooperative relation when the dog is unsupported by a log, whereby 10 the dog moved out otf the path of the saw,

In testimony whereof I affix my signature 1n presence of two Witnesses.

DAVID L.

Witnesses:

B. O. GARRETT, M. W. FULLER.

Copies 'of this patent maybe obtained for five cents eae'h, by addressing the t")ornmiss ioner .of iPa'tems. Washington, D. 01 

